No stand-by light, Stand-by light is turned off.
Stand-by light is not turned on after connecting the power.
When the power is turned off with remote control, no sign shows on stand-by light.
※ Stand-by light location varies depending on models, or LG logo or red LED appears in the center or at the bottom right corner of the screen.
How to fix
If power cable connection and AC power are normal, check below setting conditions.
※ This is not available for all models.
[Menu] → [Setting] → [General] → [Front indicator] → [Standby light] : ON
2012~2013 smart TV
[Home] or [Smart]→[Setting] →[General] →[Standby light] →[ON]
After 2014 webOS TV
[Home]→[Setting] →[Advanced setting] →[General] →[Standby light] →[ON]